Custom made bubbler?

[rexstar]

Hello!

I thought to make a custom bubbler for my 1999 BMW 318i ( little space under the hud for HHO).

Any ideas?

Square resevoir/bubbler made of plexiglass maybe?

[Bhart]

Will it fit in front of radiator, or inside the fenders?

[rexstar]

There is some space between radiator and the engine...